You might like Rosalind (http://rosalind.info/). It's like Project Euler, but with a strong bioinformatics (espeically) genetics slant. There is certainly math, especially combinatrics (for obvious reasons), but much more so that Euler there is background given in the problems, so it's often much more about coding a reasonable implementation than about knowing some obscure corner of number theory.
I really enjoy the types of problems on PuzzleNode[1]. My local coder meetup does one each month for code reviews. Their puzzles are just deep enough to where you need to think through how you'll design the system. They're really fun for exploring different programming techniques.
A lot of Project Euler is very "mathy", requiring you to read up on some mathematical shortcuts - I think https://www.hackerrank.com/ is a bit more CS-focused, i.e., there's always a specific data-structure or algorithm that solves the problem.
